Mexican police escort Jaime Herrera Herrera, 'El Viejito', an alleged member of the Joaquin 'El Chapo' Guzman's drug smuggling cartel, to be photographed by the media in Mexico City on Feb. 14.

More big fish have been netted in Mexican authorities’ battle against the country’s largest drug cartel. The Associated Press reports that two nephews of one of the leaders of the Sinaloa have bee arrested on drug charges.

The news agency reports that the office of Attorney General Marisela Morales announced today that Omar Ismael Zambada and Sergio Rodolfo Cazares Zambada have been arrested on drug possession charges.

The arrest occurred late Wednesday in Tijuana where the men were allegedly attempting to smuggle 15 kilos of cocaine. A spokesman for Morales said the men’s uncle was Ismael "El Mayo" Zambada Garcia, one of the leaders of the cartel which is run by Joaquín "El Chapo" Guzman.

The news followed the indictment on Wednesday by a federal grand jury in Texas of Guzman and Zambada Garcia on charges of murder and conspiracy to commit drug trafficking, money laundering and organized crime, according to CNN.

The April 11 indictment was unsealed on Tuesday, the news broadcaster said, adding that 22 others were also charged in the indictment.